This is a working overview of Nicotinamide mononucleotide, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2025-12-04 and is reviewed periodically as new material appears.
Two enzymatic steps define the canonical route from nicotinamide to NAD+. Nicotinamide phosphoribosyltransferase, known as NAMPT, produces NMN from nicotinamide and phosphoribosyl pyrophosphate. NMN adenylyltransferases, or NMNAT enzymes, then couple NMN with ATP to form NAD+. Whether intact NMN crosses cell membranes efficiently remains an active area of investigation; some studies propose direct transport, while others emphasize extracellular dephosphorylation to nicotinamide riboside followed by uptake. The relative contribution of each route likely depends on cell type, tissue, and experimental conditions.
Trace amounts of NMN have been reported in certain plant foods, including edamame, avocado, broccoli, cucumber, and cabbage. Reported concentrations vary widely because analytical methods differ and food matrices complicate extraction. Endogenous production in cells is generally considered more quantitatively important than dietary intake, though precise human turnover rates are difficult to establish. Commercial NMN for research or consumer products is commonly made through enzymatic synthesis or chemical phosphorylation routes. Regulatory classification differs by country; in some jurisdictions NMN is sold as a supplement, while in others it is treated as a novel food ingredient or restricted substance.
Solid NMN is generally handled as a moisture-sensitive and light-sensitive material. Suppliers commonly recommend storage at minus 20 degrees Celsius in a sealed, desiccated container, protected from light. Aqueous solutions are less stable than the solid and may degrade faster at elevated temperatures or extreme pH values. Because NMN contains a phosphate ester and a glycosidic bond, hydrolysis and other degradation pathways are plausible under unfavorable conditions. Stability data from independent laboratories remain limited, so handling recommendations often reflect supplier practice rather than published consensus.
Analytical measurement of NMN typically uses high-performance liquid chromatography with ultraviolet detection, often at a wavelength near 260 nanometers. Liquid chromatography coupled with tandem mass spectrometry provides greater sensitivity and specificity, especially for biological samples. Nuclear magnetic resonance spectroscopy can confirm structure and detect certain impurities. Purity values reported by suppliers depend on the analytical method, calibration standards, and whether related compounds such as nicotinamide or NAD+ are included in the calculation. Independent verification is useful because supplement labels may not fully describe the tested material.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C11H15N2O8P | Canonical beta anomer; charge state depends on pH. |
| Molar mass | 334.22 g/mol | Calculated for the neutral formula. |
| CAS Registry Number | 1094-61-7 | Common identifier for beta-nicotinamide mononucleotide. |
| Appearance | White to off-white powder or crystals | Varies with purity, hydration, and polymorphism. |
| Solubility | Freely soluble in water; low solubility in nonpolar solvents | Reported values depend on salt form and temperature. |
Nicotinamide mononucleotide, usually shortened to NMN, is a naturally occurring nucleotide. Its structure consists of a nicotinamide base linked to a ribose sugar that carries a phosphate group. In cells, NMN serves as an intermediate in the salvage pathway that produces nicotinamide adenine dinucleotide, or NAD+. Because NAD+ participates in many oxidation-reduction reactions, NMN sits near central metabolic processes. The compound is not a drug in most jurisdictions and is discussed mainly in biochemistry and nutrition research.
The term NMN commonly refers to the beta isomer, in which the nicotinamide group is attached to the ribose through a beta-glycosidic bond. Commercial material may be supplied as the free acid or as a salt, such as a sodium salt, which affects molecular weight and water solubility. Related compounds include nicotinamide riboside and NAD+ itself, but these are distinct molecules with different formulas and cellular handling. Laboratory research often uses the beta form because it matches the naturally occurring configuration found in biological systems.
Small amounts of NMN occur in some foods, including certain vegetables, fruits, and animal products, though the quantities are generally low and variable. Human cells also synthesize NMN internally from nicotinamide and other precursors. Research interest increased after studies examined whether raising NAD+ levels affects metabolism and aging-related pathways in animals. Evidence in humans remains limited and mixed for many outcomes, and questions about effective absorption, tissue delivery, and long-term effects are still open. Regulatory status differs by country, with some markets treating NMN as a supplement ingredient and others restricting its sale.
Regulatory treatment varies by country. In the United States, NMN has been marketed as a dietary supplement, but the Food and Drug Administration has stated that it is excluded from the dietary supplement definition because it was authorized for investigation as a new drug before being marketed as a supplement. Other jurisdictions may treat it as a novel food, a supplement, or an unapproved drug ingredient. Import and sale rules can therefore differ substantially.
Quality control for NMN focuses on identity, purity, residual solvents, heavy metals, and microbial limits. Because the molecule can absorb water, moisture content and packaging are relevant to shelf life. Suppliers may provide certificates of analysis, but independent verification is often needed for research or commercial use. The long-term stability of different crystal forms, salt forms, and formulations is not fully characterized in the public literature. Some degradation products and their effects on product performance remain open questions.
Nicotinamide mononucleotide, abbreviated NMN, is a nucleotide composed of nicotinamide, ribose, and phosphate. Its structure links nicotinamide to D-ribose 5-phosphate through a glycosidic bond, placing it in the pyridine nucleotide family. The compound exists in alpha and beta anomeric forms, and the beta form is the one used in NAD+ biosynthesis. NMN is not a protein or a hormone; it is a small water-soluble molecule that occurs in living cells as a metabolic intermediate.
Natural sources of NMN include mammals, plants, and microorganisms, where it functions as an intermediate in NAD+ salvage and biosynthesis pathways. In mammals, the enzyme nicotinamide phosphoribosyltransferase produces NMN from nicotinamide and phosphoribosyl pyrophosphate. NMN is then converted to NAD+ by nicotinamide mononucleotide adenylyltransferase. Some foods contain measurable NMN, but reported amounts vary widely by species, tissue, and analytical method. The extent to which dietary NMN contributes to cellular NAD+ pools remains an open research question.
Chemically, NMN is described by the molecular formula C11H15N2O8P and a molecular mass near 334.22 g/mol. The beta anomer has a CAS Registry Number of 1094-61-7. It is typically supplied as a white to off-white powder for laboratory use. The molecule carries a phosphate group and a positively charged nicotinamide ring, giving it polar and water-soluble character. These properties influence how it is detected, purified, and stored in research and analytical laboratories.
Among her appointments are James Cleverly, who becomes Shadow Housing Secretary. Welsh Conservative member of the Senedd Laura Anne Jones joins Reform UK. 19-year-old George Finch is formally appointed as leader of Warwickshire County Council, making the Reform UK councillor the UK's youngest permanent council leader. 23 July – The Scottish Greens are forced to issue a new list of candidates for the next Holyrood election after an error was found in counting the votes. 24 July – Jeremy Corbyn and Zarah Sultana officially launch their new political party, which has the provisional name Your Party. 25 July – 220 MPs sign a letter to the prime minister urging him to recognise Palestinian statehood. Former SNP MP Mhairi Black announces that she has left the party, citing its stance over transgender rights and Palestine as her main reasons for doing so. US President Donald Trump arrives at Prestwick Airport to begin a four-day private visit to the United Kingdom during which he will meet Prime Minister Keir Starmer and First Minister of Scotland John Swinney. 29 July – Starmer announces the UK will recognise a Palestinian state in September unless Israel takes "substantive steps to end the appalling situation in Gaza". Benjamin Netanyahu, Israel's prime minister, says in response that to do so "rewards Hamas's monstrous terrorism". Ghazi Hamad of Hamas welcomes the announcement as "one of the fruits of October 7". Trump completes his four-day visit to Scotland and returns to the United States.
People with cirrhosis have a 40% lifetime risk of developing hepatic encephalopathy. The median survival after the development of hepatic encephalopathy is 0.9 years. Mild hepatic encephalopathy (also known as covert hepatic encephalopathy), in which symptoms are more subtle, such as impairments in executive function, poor sleep or balance impairment is also associated with a higher risk of hospitalization and death (18% in those with covert hepatic encephalopathy vs 3% in those with cirrhosis and no HE).
Somatostatin receptor antagonists (or somatostatin inhibitors) are a class of chemical compounds that work by imitating the structure of the neuropeptide somatostatin. The somatostatin receptors are G protein-coupled receptors. Somatostatin receptor subtypes in humans are sstr1, 2A, 2 B, 3, 4 and 5. While normally expressed in the gastrointestinal (GI) tract, pancreas, hypothalamus, and central nervous system (CNS), they are expressed in different types of tumours. The predominant subtype in cancer cells is the sstr2 subtype, which is expressed in neuroblastomas, meningiomas, medulloblastomas, breast carcinomas, lymphomas, renal cell carcinomas, paragangliomas, small cell lung carcinomas and hepatocellular carcinomas. As a radiopharmaceutical compound that is selective for somatostatin receptors, there is research being done to for these radiolabeled compounds to act as diagnostic tests in PET scans for neuroendocrine tumors and other tumors not previously targeted with radiolabeled somatostatin receptor agonists, and to act as radiopharmaceutical therapeutic compound, more specifically to conduct peptide radionuclide receptor therapy. There are also some non-radiopharmaceutical compounds that are developed as competitive inhibitors of somatostatin, such as the hormone antagonist cyclosomatostatin.
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== History == The detection of nitrates and nitrites for GSR has been around since the early 1900s. The first recorded use of paraffin wax as a lifting medium was done by Dr. Iturrioz in 1914 and was popularized in 1933 by Teodoro Gonzalez of the Mexico City Police Laboratory. The aptly named paraffin test is also referred to as the diphenylamine test, dermal nitrate test and the Gonzalez test. This test consisted of coating a suspect's hands with paraffin wax, allowing it to solidify and peeling it away before adding a diphenylamine/sulfuric acid reagent. The presence of dark blue spots is said to indicate a positive result. This is no longer used in casework due to the high number of false positives caused by the commonality of nitrates and nitrites in a variety of mundane products such as fertilisers. In 1971 John Boehm presented some micrographs of gunshot residue particles found during the examination of bullet entrance holes using a scanning electron microscope. If the scanning electron microscope is equipped with an energy-dispersive X-ray spectroscopy detector, the chemical elements present in such particles, mainly lead, antimony and barium, can be identified. In 1979 Wolten et al. proposed a classification of gunshot residue based on composition, morphology, and size. Four compositions were considered characteristic:
=== Effect on metabolism === Horses with PSSM have elevated levels of muscle glycogen at rest. During exercise, glycogen levels are depleted faster than is seen in unaffected horses, and are reduced down to levels considered normal for a resting non-PSSM horse. This demonstrates that glycogen metabolism is actually normal in these animals. However, PSSM horses synthesize muscle glycogen at double the rate of a normal horse once exercise has ceased, which leads to elevated muscle glycogen. The exact mechanism of abnormal glucose metabolism has not yet been established, but it may have similarities to phosphofructokinase deficiency in humans. Quarter Horse-related breeds with PSSM show insulin sensitivity, which improves glucose uptake by cells, and these horses clear the blood of glucose more quickly after eating than unaffected horses. This provides easy access to glucose by the muscles, which can then use the substrate to produce glycogen. The GSY1 defect, which up-regulates the glycogen synthase enzyme, allows the muscles to use this glucose to rapidly produce glycogen for storage in the muscle. Surprisingly, increased insulin sensitivity is not seen in draft horse breeds. Dietary and exercise manipulation may be used to counteract these metabolic changes. Approximately 50% of horses that adhere to the dietary recommendations, and 90% of horses that adhere to both dietary and exercise recommendations, have few to no episodes of exertional rhabdomyolysis.
1993/1626) Castle Vale Housing Action Trust (Area and Constitution) Order 1993 (S.I. 1993/1634) Gipsy Encampments (Borough of Surrey Heath) Order 1993 (S.I. 1993/1635) Tower Hamlets Housing Action Trust (Area and Constitution) Order 1993 (S.I. 1993/1636) Value Added Tax (General) (Amendment) (No. 5) Regulations 1993 (S.I. 1993/1639) Reconstitution of the Witham First District Internal Drainage Board Order 1993 (S.I. 1993/1640) Import (Plant Health Fees) (England and Wales) Order 1993 (S.I. 1993/1641) Plant Passport (Plant Health Fees) (England and Wales) Regulations 1993 (S.I. 1993/1642) Environmental Protection (Controls on Injurious Substances) (No. 2) Regulations 1993 (S.I. 1993/1643) Alcan Aluminium UK Ltd. (Rateable Values) (Scotland) Order 1993 (S.I. 1993/1644) Forth Ports plc (Rateable Values) (Scotland) Order 1993 (S.I. 1993/1645) Caledonian MacBrayne Limited (Rateable Values) (Scotland) Order 1993 (S.I. 1993/1646) Tunbridge Wells and Eridge Light Railway Order 1993 (S.I. 1993/1651) Asylum and Immigration Appeals Act 1993 (Commencement and Transitional Provisions) Order 1993 (S.I. 1993/1655) Immigration (Restricted Right of Appeal against Deportation) (Exemption) Order 1993 (S.I. 1993/1656) Immigration (Variation of Leave) (Amendment) Order 1993 (S.I. 1993/1657) Extraction Solvents in Food Regulations 1993 (S.I. 1993/1658) Education (Assisted Places) (Scotland) Amendment Regulations 1993 (S.I. 1993/1659) St Mary's Music School (Aided Places) Amendment Regulations 1993 (S.I. 1993/1660) Asylum Appeals (Procedure) Rules 1993 (S.I.
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NMN is nicotinamide mononucleotide, a nucleotide intermediate in NAD+ metabolism. It occurs naturally in cells and can also be produced synthetically for research or commercial use. Its name reflects its composition: nicotinamide, ribose, and a phosphate group.
NMN is a direct precursor in the NAD+ salvage pathway. NMNAT enzymes convert NMN and ATP into NAD+, a coenzyme used in many cellular reactions. This relationship makes NMN a focus of studies on NAD+ metabolism.
Small amounts of NMN have been reported in some plant foods, but measured levels vary and are not consistently quantified. Dietary contribution is generally considered minor compared with endogenous production. Food-matrix effects make accurate analysis difficult.
Solid NMN is commonly stored frozen at about minus 20 degrees Celsius, sealed against moisture, and protected from light. Solutions are typically prepared fresh because they can degrade more quickly. Specific storage conditions can vary by supplier and intended use.